Lake Fifteen is a 42-acre lake in Minnesota that connects to the Thunder Bay River. Paddlers can reach the river by heading southwest from the lake.

The lake sits among several other numbered lakes in the area, including Lake Ten (155 acres), Lake Fourteen (42 acres), Lake Eleven (147 acres), and Lake Thirteen (50 acres).

Minnesota state law requires all paddlers to have: - One U.S. Coast Guard-approved life jacket per person - Children under 10 must wear life jackets while on watercraft - A whistle and white light for paddling between sunset and sunrise - Annual watercraft licensing ($42 in 2024) for kayaks over 10 feet in length, with exceptions for out-of-state vessels and shorter stays

Due to the remote nature of Lake Fifteen, paddlers should scout access points and conditions before launching, and ensure they have all necessary safety equipment and supplies.